A theoretical and empirical study of the response of the high latitude thermosphere to the sense of the 'Y' component of the interplanetary magnetic field

Details A theoretical and empirical study of the response of the high latitude thermosphere to the sense of the 'Y' component of the interplanetary magnetic field A theoretical and empirical study of the response of the high latitude thermosphere to the sense of the 'Y' component of the interplanetary magnetic field

Jan 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986p%26ss...34....1r&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 34, Jan. 1986, p. 1-40. SERC-NASA-supported research.

Computer Science

62

Interplanetary Magnetic Fields, Polar Regions, Solar Terrestrial Interactions, Thermosphere, Wind (Meteorology), Convection, Electric Fields, International Sun Earth Explorer 3, Solar Wind, Time Dependence, Wind Profiles

Scientific paper

Patterns of magnetospheric energetic plasma precipitation as a function of the Y component of the Interplanetary Magnetic Field (IMF) are studied. The development of a three-dimensional, time-dependent global thermospheric model using a polar conversion electric field with a dependence on the Y component of the IMF to evaluate thermospheric wind circulation is examined. Thermospheric wind data from the ISEE-3 satellite, Dynamics Explorer-2 satellite, and a ground-based Fabry-Perot interferometer in Kiruna, Sweden, collected on December 1, 2, 6, 25, 1981 and February 12, 13, 1982 are described. The observed data and simulations of polar thermospheric winds are compared. In the Northern Hemisphere a strong antisunward ion flow on the dawn side of the geomagnetic polar cap is observed when the BY is positive, and the flow is detected on the dusk side when the BY is negative. It is concluded that the strength and direction of the IMF directly control the transfer of solar wind momentum and energy to the high latitude thermosphere.

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